Double-drum hoist



July 21; 1926. 1,594,172

(3. C. HANSEN I DOUBLE DRUM HOIST Filed Sept. 11, 1925; 2 Shets-Sheet 1 Ju y 27,1926. 1,594,172

C. C. HANSEN DOUBLE DRUM HOIST Filed Sept. 11 1925 2 Shgets-5heet 2 Y Patented July 27, 1926 UNITED STATES PATENT OFFICE.

CHARLES C. HANSEN, 0E EAS'ION, PENNSYLVANIA, ASSIGNOR 'ro IN'GERSOLL-RAND COMPANY, OF JERSEY CITY, NEW JERSEY, A CORPORATION 0E NEW JERSEY.

DOUBLE-DRUM HOIS'I.

Application filed September 11, 1925. Serial No. 55,679.

This invention relates to double drum hoists, more especially to a hoist of the general type shown in Reissue Patent No. 15,- 780 granted March 4-, 1924 to Jesse Ditson, in which either drum may be driven from a common driving shaft connected to be operated by a reversible motor.

The objects of the invention are to lighten the construction of such hoists and at the same time brace and stiffen the frame and reduce the vibration.

The invention is shown in one of its preferred forms in the accompanying drawings, in which Figure l is a longitudinal sectional ele' vation of a hoist;

Figure 2 is a transverse sectional View on the line 2-2 of Figure 1 looking in the direction of the arrows;

Figure 3 is a detail view partly broken away, similar to Figure 2, showing the pawl in a different position.

Referrin to the drawings, the main frame consists of a base A and end frames B and G. The supplemental end frame D in this instance forms the back head of a pressure fluid motor and constitutes a part of the end frame B. The front head E of the motor is bolted to the frames B and D as by means of the bolts F. The motor itself may be of any suitable type but in this instance is a flat piston or Dake motor, like that disclosed in said Ditson Reissue Patent No. 15,780, and is of the reversible type, the pressure fluid being controlled by the throttle handle G. Only so much; of the motor parts are shown as will indicate the type of motor, and as illustrated the upper portion of the end frame B forms a square piston chamber H in which the outer frame piston J reciprocates, and an inner piston K reciprocates at right angles to the frame piston J. The resultant of forces imparts rotation to the crank L of the main shaft O which is journaled in the end frames and provided with the anti-friction bearings P. A hollow rotatable center bearing Q is also journaled in the end frames forming a drum shaft and is provided with the anti-friction bearings P.

The main shaft 0 is preferably within the hollow center bearing Q. Drums S and T are rotatably mounted relatively to the hollow center bearing Q, and in this instance A main driver X, shown in this instance as an internal gear, is connectedto one end of the center bearing as by means of the key Y and is geared to the main shaft 0 by suitable reduction gearing. In this instance, a pinion a; on the end of the main shaft 0 meshes with an intermediate gear I) on the countershaft 0 having the anti-friction bearings d and provided with the pinion 6 meshing with the internal gear or main driver X. The end frame C also constitutes the gear box having the cover plate f and caps g and h.

The drums S and T have wound upon them the usual haulage and tail ropes and 7a, and in the present construction S may be considered the haulage drum and T the tail rope drum, these functions being reversed according to the directionof rotation of the motor.

The drums are provided with drum drivers, in this instance shown as toothed rings 0 and 10 having teeth 9 and r facing in opposite directions. A pawl or clutch member s is slidably carried between the projecting lugs 25 on the main driver X in position between the drum drivers so that said pawl may automatically be shifted into engagement with one drum driver or the other, according to the direction of the rotation of ghe motor, as in said Reissue Patent No. 15,-

In Figure 2 the main shaft 0 is assumed to be rotating clockwise, as the figure is viewed, while the rotatable center hearing or drum shaft Q is being rotated counterclockwise through the train of gearing de scribed and the main driver X. The pawl s has been actuated by the backs a of the teeth 7' on the drum driver 70 of the haulage erable strain upon the frame due to the loads carried and due to the vibration set up by the motor, and although the'center bearing Q is of substantial construction and braces the frame and takes a considerable portion of the load, there is a tendency for the end frames to separate and vibrate. In order to counteract this tendency, reduce vibration and stiffen the frame, a cross brace, preferably in the form of a bar or rod Z, is connected between the outer free ends of the main portions of the end frames.

This bracing device may be constructed in any suitable manner and is not necessarily a rod or bar, although so shown in the present instance. This bar Z is preferably provided with the'washers o and the spacing sleeve w between the said bearing washers. The bar Z is preferably con structed in the form of a bolt having the head as and the nut y for pinning the bolt in lace. This cross brace also acts as a gui e and deflector for the ropes or cables 7' and 7c, tending to confine the cables between the drum flanges and prevent the cables from becoming tangled.

One or both drums may be provided with brake bands 2 extending partially over the drum flanges and secured at their lower ends tov the brackets 3 on the base A. The upper ends of the brake bands are conveniently supported by the brace bar Z as by meansof the sleeves pivoted on the bar Z and having rings 5' through which the screw threaded ends 6 on the brake bands extend. Wing nuts 7 serve as adjusting devices for the brake I claim: I

1. In a double drum hoist, the combination of a base and end frames, a reversible motor, a hollow rotatable center bearing journaled in said end frames and forming a drum shaft, concentric drums rotatably mounted relatively to the hollow center bearing, a main shaft within the center bearing also journaled in the end frames, a main driver connected to said center bearing and geared to the main shaft, a clutch member on the main driver adapted to connect either drum to the said main driver, a cross brace connecting the outer free ends of the end frames to stiffen the frame structure, and drum brakes anchored pivotally to the cross brace for checking rotation of the drums.

2. In a double drum hoist, the combination of a base and end frames, a reversible motor, a hollow rotatable center bearing journaled in said end frames and forming a drum shaft, drums rotatably mounted relatively to the hollow center bearing, a main shaft within the center bearing, a main driver connected to one end of said center bearing and geared to the main shaft, a clutch member on the main driver adapted to connect either drum to the said main driver, a cross brace connecting the outer free ends of the end frames to stiffen the frame structure, and a drum brake supported at one end by said cross brace and anchored at its other end to the base.

In testimony whereof I have signed this specification.

CHARLES. C. HANSEN. 

